On May 31 at 1 p.m., over a century after its founding, South Philadelphia’s Shivtei Yeshuron-Ezras Israel, the last “storefront shul” left in the neighborhood, becomes one of the focal points of the Hidden City Festival.

Well before Google Glass is expected to be publicly available sometime in 2014, the device already is generating controversy. A few "explorers" who've been chosen to test drive it speculate how it could impact Jewish life.